package com.atguigu.gmall.common.service;

import org.springframework.amqp.AmqpException;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessagePostProcessor;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * @author mqx
 * 负责发送消息
 * @date 2020-8-11 14:19:42
 */
@Service
public class RabbitService {

    @Autowired
    private RabbitTemplate rabbitTemplate;

    /**
     * 制作一个发送信息的方法
     * @param exchange 交换机
     * @param routingKey 路由键
     * @param message 消息主体
     * @return
     */
    public boolean sendMessage(String  exchange,String routingKey,Object message){
        rabbitTemplate.convertAndSend(exchange,routingKey,message);
        return true;
    }

    /**
     *  发送延迟消息方法
     * @param exchange 交换机
     * @param routingKey 路由键
     * @param message 消息主体
     * @param delayTime 消息过期时间
     * @return
     */
    public boolean sendDelayMessage(String  exchange,String routingKey,Object message,int delayTime){
        rabbitTemplate.convertAndSend(exchange, routingKey, message, new MessagePostProcessor() {
            @Override
            public Message postProcessMessage(Message message) throws AmqpException {
                // 设置消息的过期时间：TTL
                message.getMessageProperties().setDelay(delayTime*1000);
                return message;
            }
        });
        return true;
    }

}
